Double-network hydrogels with superior self-healing properties using starch reinforcing strategy
| Autor: | Qingling Wang, Jianguo Zhang, Jinghao Li, Xiaoqin Shang, Liming Wang, Peng Liu, Guojie Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Starch Organic Chemistry Double network Composite number 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Soft materials 0104 chemical sciences chemistry.chemical_compound chemistry Self-healing Self-healing hydrogels Ultimate tensile strength Materials Chemistry Composite material 0210 nano-technology Elastic modulus |
| Zdroj: | Carbohydrate polymers. 257 |
| ISSN: | 1879-1344 |
| Popis: | Constructing hybrid double network (DN) hydrogels has become an important strategy to prepare strong and tough hydrogels with good self-healing properties for durable usage. However, the recoverable and self-healing efficiencies of DN hydrogels are usually low. We develop a type of hybrid DN hydrogel, which contain the starch network for generating strong dynamic interactions within the gel matrix. The composite gels show tensile strength over 200 kPa with the elastic modulus of ∼29.7 kPa. Gelatinization of cassava starch is a key procedure that can significantly raise mechanical strengths. The healing efficiency of the composite gel gradually increased to as high as 99 % after 24 h at room temperature. This work shows that dynamic physical bonding in hydrogels can be greatly enhanced by a simple starch reinforcing tactic. The combination of naturally abundant starch with hydrophilic polymers provides a general approach to design functional soft materials for applications in various fields. |
| Databáze: | OpenAIRE |
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